At first glance, the Map of Online Communities (2010 update) looks like so much more social network geekery.

Even upon closer inspection, it’s mostly just more social network geekery. Still, it’s a fascinating graphic — not only because the mountain of hours it must have taken to complete, but because the map quickly illustrates the complete contours on the entire social networking world, from Facebook as the massive, dominating China-esque center, to Twitter to Skype to YouTube, and a whole raft of lesser states. The map shows where people are most active in the online world. And where they are not. Strategize accordingly.

(HINT: You cannot afford to overlook Facebook.)